Eight years after the mysterious death of his father, Kaito Kuroba, a slightly mischievous but otherwise ordinary teenager, discovers a shocking secret: the Phantom Thief Kaito Kid—also known as "The Magician Under the Moonlight"—was none other than his own father. The former thief was murdered by a criminal organization seeking a mythical stone called the Pandora Gem, said to shed a tear with the passing of the Valley Comet that comes every ten thousand years. When the tear is consumed, the gem supposedly grants immortality. Vowing to bring those responsible for his father's death to justice, Kaito dons the Phantom Thief's disguise, stealing priceless jewels night after night to find the Pandora Gem before his enemies can use the power for themselves.

Over three hundred years have passed since the Calamity War, the great conflict between Earth and its outer space colonies. Now Earth is ruled over by four economic blocs, and the military organization Gjallarhorn is responsible for keeping the peace. Mars, on the other hand, depends heavily on Earth's economy. Horrified by the appalling living conditions that Mars' inhabitants have to bear, Kudelia Aina Bernstein, a young aristocrat from the Chryse Autonomous Region, gets involved in the Red Planet's independence movement. She hires the services of a local company, Chryse Guard Security (CGS), to escort her on the journey to Earth to negotiate economic conditions with the earthly bloc that controls the region. The Third Army Division—consisting of Mikazuki Augus, Orga Itsuka, and many other child soldiers—are chosen to protect her. When Gjallarhorn attacks the CGS facilities to assassinate the young revolutionary threatening their interests, Orga and his comrades must not let the attackers accomplish their goal—in fact, Gjallarhorn's actions might turn out to be the unintentional catalyst that leads the children to be the forgers of their own destiny. [Written by MAL Rewrite]

Mysteria Academy is a prestigious magic school that teaches magic without discrimination to the three factions (men, gods, demons), who usually are engaged in battle with each other. Two of the academy's students are Anne, a princess and honor student, and Grea, a princess born from a dragon and a human. (Source: ANN)

Keima Katsuragi, the "God of Conquest," returns to his quest of expelling runaway spirits that have possessed the hearts of women. Still stuck in his contract with the demon Elsie, he must continue to utilize the knowledge he has gained from mastering multitudes of dating simulators and chase out the phantoms that reside within by capturing the hearts of that which he hates most: three-dimensional girls. However, the God of Conquest has his work cut out for him. From exorcising karate practitioners and student teachers to the arrival of Elsie's best friend from Hell, he is up against a wide array of girls that will test his wit and may even take him by surprise. Though he would much rather stick to the world of 2D, he is trapped in lousy reality, and so Keima must trudge forward in his conquest of love. [Written by MAL Rewrite]